Friction-gear.



W. A. GEIGER.

FRICTION GEAR.

APPLICATION FILED Dec. 6. 1916..

Patented July 31, 1917.

UNITED STATES PATENT OFFICE.

WILLIAM GEIGER, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. MINER, F

GHAZY, NEVI YORK.

FBIC TION-GEAB.

Specification of Letters I'atenti" Patented July 31, 1917.

Application filed December 6, 1916. Serial No. 135,323.

The plate 17 isslipped over the cylinderB part of this specification.

friction gears.

The object of the invention is to provide a, oombined irictionf-shelland spring cas ng This invent onrelates to improvements in forfrictiongears wherein the friction shell into engagement with the'collar16, as clearly appears from Fig. 1, and is secured to the springcasing Aby a plurality of bolts of other suitable fastenin devices that extendcasing. Coiiperable with the friction shell B are friction shoes 20, andwedge 21 assembled in a well known manner, there being a preliminaryspring 22.between said Shoes and the main spring follower 23.

With the arrangement thus provided, it is apparent thatthe cylinder 13is not weak- 65 through said plate an the end wall of the ened and maybeireadilvmannfactured since the metal of thecylin er proper .isof subismade separate from the spring'casing and I stantiallythe same thicknessthroughout its the parts are detachably secured together.

In the drawingforming a part of th s specificatiom lfigure 1 is a partlongitudinal; section, partside elevation of a friction gear of a wellknown type, illustrating my improvements in connection therewith. Fig. 2is ancnd. elevation of the structure illustrated in Fig. 1.' ,And Fig. 3is a perspective viewof thcifriction cylinder proper, dc-

k In said drawing, A designates a spring :casing and B africtioncylinder detachably secured thereto. The spring casing is of3ofsuhstantially rectangular form and has a "front wall 10, rear wall11, upper and lower walls 12-12 and open at its sides to permit theinsertion of the springs 13. The front wall 10 is provided with anannular recess 14, thus forming a corresponding annular shoulder 15 toreceive the inner end of the friction cylinder B. The latter, as shown,

is of substantially uniform thickness throughout its length and near itsInner end is provided with an annular collar 16 adapted to fit saidannular recess 14, the arrangement thus described providing shoulderedengagement between the members A and B. The outer surface of the collar16 is designed to come flush with the outer surface of the end wall 10of the casing A and in order to hold the parts securely together, a

substantially rectangular plate 17 is provided which is centrallyrecessed as indicated at 18'to snugly fit over the friction cylinder.

entire length,"thus minimizing casting and annealing strainsJ Byproviding the shouldered engagement between the shell andcas- ,ing, thepressure from the cylinder during actuation of the gear is transmittedto the casing over a relatively large area. 'By removing the plate :17,it is apparent that the friction cylinder can be renewed or replacedgagement with 'each other, and means for securing said casing and shelltogether including, a series of fastening devices passin throughportions of the casing and clear o the shell. V 2. In a friction gear,the combination with a spring casin of a separate friction shell,

said casing an shell having shouldered en-' gagement with each' other,and means for securing said casing andshell together-including, a plateoverlapping portions -,of said shell and casing and fastening devicesextending through said plat and casin" 3. As an article of ma ufacture,a combined friction shell and spring casi" for draft gears, said shelland easing co prising, a cylinder friction shell proper vi an annularcollar near one end thereofll and a rectangular sprm 5 centruiiy indcrand engagmg the nuts 0011a r, ar ul plurality of. fastem' casing buyingan zinnnlar I'QQGSS in the. rout wall therof to ac- 'commodate saidcollar shquldeled engagement andt ie reby provide between the parts, arecessed plate fitting-over said cylr face of said ng devices extendingthrough said Matt! and U10 adjuccnt portions of said springfvnsingfmholding the parts; in :wxomhlml position.

Ix; witness that '1 claim the 'fm'ugning l have hereuntoSllbfifll'ibl'l] my munv ihis 4L1] day of December 1916.

\VILLIAM A. GEIGICH.

